mlxsw: spectrum: Support decap-only IP-in-IP tunnels

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Current code for offloading IP-in-IP tunneling assumes that there is no
decap without encap. But that's never true for IPv6 overlays, and is not
true for IPv4 ones either, if net.ipv4.conf.*.rp_filter is unset.

To support decap-only tunnels, an IPIP entry is now created as soon as
an offloadable tunneling device is created. When that netdevice is up'd,
a decap route is looked up and possibly offloaded. Thus decap is not
handled implicitly as part of mlxsw_sp_ipip_entry_get() call anymore,
but needs to be done explicitly after the get, if desired.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Petr Machata 2017-10-16 16:26:37 +02:00 • committed by David S. Miller

parent 6698c168bf

commit 0063587d35

3 changed files with 109 additions and 10 deletions

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8

drivers/net/ethernet/mellanox/mlxsw/spectrum.c

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6

drivers/net/ethernet/mellanox/mlxsw/spectrum.h

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105

drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c

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